github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/sentry/fsimpl/kernfs/save_restore.go (about)

     1  // Copyright 2020 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package kernfs
    16  
    17  import (
    18  	"sync/atomic"
    19  
    20  	"github.com/SagerNet/gvisor/pkg/refsvfs2"
    21  )
    22  
    23  // afterLoad is invoked by stateify.
    24  func (d *Dentry) afterLoad() {
    25  	if atomic.LoadInt64(&d.refs) >= 0 {
    26  		refsvfs2.Register(d)
    27  	}
    28  }
    29  
    30  // afterLoad is invoked by stateify.
    31  func (i *inodePlatformFile) afterLoad() {
    32  	if i.fileMapper.IsInited() {
    33  		// Ensure that we don't call i.fileMapper.Init() again.
    34  		i.fileMapperInitOnce.Do(func() {})
    35  	}
    36  }